Valence and Core-Level X-ray Photoelectron Spectroscopy of a Liquid Ammonia Microjet

0501545 - ÚOCHB 2020 RIV US eng J - Journal Article
Buttersack, Tillmann - Mason, Philip E. - McMullen, R. S. - Martinek, Tomáš - Březina, Kryštof - Hein, D. - Ali, H. - Kolbeck, C. - Schewe, C. - Malerz, S. - Winter, B. - Seidel, R. - Maršálek, O. - Jungwirth, Pavel - Bradforth, S. E.
Valence and Core-Level X-ray Photoelectron Spectroscopy of a Liquid Ammonia Microjet.
Journal of the American Chemical Society. Roč. 141, č. 5 (2019), s. 1838-1841. ISSN 0002-7863. E-ISSN 1520-5126
R&D Projects: GA MŠMT(CZ) EF16_027/0008477; GA ČR(CZ) GBP208/12/G016
Institutional support: RVO:61388963
Keywords : photoelectron spectroscopy * liquid ammonia * microjet
OECD category: Physical chemistry
Impact factor: 14.612, year: 2019
Method of publishing: Open access
https://pubs.acs.org/doi/10.1021/jacs.8b10942

Photoelectron spectroscopy of microjets expanded into vacuum allows access to orbital energies for solute or solvent molecules in the liquid phase. Microjets of water, acetonitrile and alcohols have previously been studied, however, it has been unclear whether jets of low temperature molecular solvents could be realized. Here we demonstrate a stable 20 mum jet of liquid ammonia (-60 °C) in a vacuum, which we use to record both valence and core-level band photoelectron spectra using soft X-ray synchrotron radiation. Significant shifts from isolated ammonia in the gas-phase are observed, as is the liquid-phase photoelectron angular anisotropy. Comparisons with spectra of ammonia in clusters and the solid phase, as well as spectra for water in various phases potentially reveal how hydrogen bonding is reflected in the condensed phase electronic structure.
Permanent Link: http://hdl.handle.net/11104/0296304